/usr/share/doc/libglobus-gsi-proxy-core-dbg/changelog.Debian.gz is in libglobus-gsi-proxy-core-dbg 6.2-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libglobus-gsi-proxy-core-dbg/../libglobus-gsi-proxy-core0/changelog.Debian.gz